Airman 1st Class Tyler Butler (left) and Staff Sgt. Jordan Smith, both crew chiefs with the 314th Aircraft Maintenance Squadron, chains down a C-130 Hercules Jan. 19, 2011, at Little Rock Air Force Base, Ark. The purpose of chaining, or mooring, an airplane is to secure it during inclement weather. (U.S. Air Force Photo/Staff Sgt. Nestor Cruz)